LG W3000 Service Manual
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LG W3000 Service Manual

Gsm phone
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GSM Phone
SERVICE MANUAL
MODEL : W3000
P/N : XXXXX
JUNE, 2002

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Summary of Contents for LG W3000

  • Page 1 GSM Phone SERVICE MANUAL MODEL : W3000 P/N : XXXXX JUNE, 2002...

  • Page 2: Table Of Contents

    Table Of Contents 3.10 Display and Interfaces ......28 1. INTRODUCTION ........3.11 Keypad Switches and Scanning ..29 1.1 Purpose ..........4 3.12 Microphone ......... 30 1.2 Regulatory Information ......4 3.13 Earpiece ..........31 A. Security ..........4 3.14 Hands-free Interface ......
  • Page 3 7. BLOCK DIAGRAM ......106 12. AUTO CALIBRATION ....121 7.1 Main Board ........106 12.1 Overview ........121 7.2 FPCB ..........107 12.2 Requirements ....... 121 7.3 RF ............ 107 12.3 Menu and settings ......121 12.4 AGC ..........123 8.
  • Page 4 LGE Inc. Furthermore, LGE Inc. reserves the right, without notice, to make changes to equipment design as advances in engineering and manufacturing methods warrant. This manual provides the information necessary to install, program, operate and maintain the W3000. - 3 -...

  • Page 5: Introduction

    1. INTRODUCTION 1. INTRODUCTION 1.1 Purpose This manual provides the information necessary to repair, calibration, description and download the features of the LG-W3000. 1.2 Regulatory Information A. Security Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example, persons other than your company’s employees, agents, subcontractors, or person...

  • Page 6: Notice Of Radiated Emissions

    The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly different. G. Interference and Attenuation An LG-W3000 may interfere with sensitive laboratory equipment, medical equipment, etc. Interference from unsuppressed engines or electric motors may cause problems. H. Electrostatic Sensitive Devices...

  • Page 7: Abbreviations

    Global System for Mobile Communications IPUI International Portable User Identity Intermediate Frequency Liquid Crystal Display Low Drop Output Light Emitting Diode LG-W3000 LG GSM Phone LG Electronics OPLL Offset Phase Locked Loop Power Amplifier Module Printed Circuit Board Programmable Gain Amplifier Phase Locked Loop...
  • Page 8 1. INTRODUCTION Time Division Duplex TDMA Time Division Multiple Access UART Universal Asynchronous Receiver/Transmitter Voltage Controlled Oscillator VCTCXO Voltage Control Temperature Compensated Crystal Oscillator Wireless Application Protocol - 7 -...

  • Page 9: Performance

    2. PERFORMANCE 2. PERFORMANCE 2.1 H/W Features Item Feature Comment Li-ion, 750 mAh Standard Battery Size: 41 73.9 5mm Weight: 22 g AVG TCVR Current GSM , EGSM: 243 mA, DCS: 209 mA Stand by Current < 4 mA Talk time Up to 3 hours (GSM TX Level 7) Stand by time Up to 200 hours (Paging Period: 9, RSSI: -85 dBm)

  • Page 10: Technical Specification

    2. PERFORMANCE 2.2 Technical Specification Item Description Specification TX: 890 + n 0.2 MHz RX: 935 + n 0.2 MHz (n = 1 ~ 124) EGSM Frequency Band TX: 890 + (n – 1024) 0.2 MHz RX: 935 + (n – 1024) 0.2 MHz (n = 975 ~ 1024) TX: 1710 + (n –...
  • Page 11 2. PERFORMANCE Item Description Specification GSM, EGSM Offset from Carrier (kHz). Max. dBc +0.5 600 ~ 1,200 1,200 ~ 1,800 1,800 ~ 3,000 3,000 ~ 6,000 Output RF Spectrum 6,000 (due to modulation) Offset from Carrier (kHz). Max. dBc +0.5 600 ~ 1,200 1,200 ~...
  • Page 12 2. PERFORMANCE Item Description Specification GSM, EGSM BER (Class II) < 2.439% @-102 dBm Bit Error Ratio BER (Class II) < 2.439% @-100 dBm RX Level Report Accuracy 3 dB 8 3 dB Frequency (Hz) Max.(dB) Min.(dB) Sending Response 1,000 2,000 3,000 3,400...
  • Page 13 2. PERFORMANCE Item Description Specification 32.768KHz tolerance ≤ 30 ppm Full power < 243 mA (GSM, EGSM) ; < 209 mA (DCS) Power Consumption Standby - Normal < 4 mA (Max. power) GSM/ Level 7 (Battery Capacity 750mA): Up to 180 Min Talk Time GSM/ Level 12 (Battery Capacity 750mA): Up to 300 Min Under conditions, Up to 200 hours:...

  • Page 14: Technical Brief

    3. TECHNICAL BRIEF 3. TECHNICAL BRIEF 3.1 General Description The RF parts consists of a transmitter part, a receiver part, a synthesizer part, a voltage supply part, a VCTCXO part. And the main RF Chipset CX74017[U441]is a single-chip dual-band transceiver for the extended global system for mobile communication[E-GSM900MHz]/Digital communication system[DCS1800MHz] voice and data transfer applications.

  • Page 15: Rf Front End

    3. TECHNICAL BRIEF A. RF front end RF front end consists of Antenna Switch(FL405), dual band LNAs integrated in transceiver(U441). The Received RF signals (GSM 925MHz ~ 960MHz, DCS 1805MHz ~ 1880MHz) are fed into the antenna or mobile switch. An antenna matching circuit is between the antenna and the mobile switch.

  • Page 16: Transmitter Part

    3. TECHNICAL BRIEF 3.3 Transmitter Part The Transmitter part contains CX74017 active parts, PAM and Antenna Switch. The CX74017 active part consists of a vector modulator and offset phase-locked loop block(OPLL) including down-converter, phase detector, loop filter and dual band transmit VCO which can operate at either final RF output frequency.

  • Page 17: Opll

    3. TECHNICAL BRIEF B. OPLL The offset mixer down converts the feedback Tx RF signal using LO to generate a IF modulating signal. The IF signal goes via external passive bandpass filter to one port of the phase detector. The other side of the phase detector input is LO signal.

  • Page 18: Power Amplifier

    3. TECHNICAL BRIEF The counter and mode settings of the synthesizer are also programmed via 3-wire interface. CX74017 2V7_VTCXO 13MHz vco = (N+3.5+FN/2^22) ref/R 13MHz Fractional-N REFCLK Base Band Block Figure 3-3. Synthesizer Block diagram D. Power Amplifier The RF3110[U416] is a Dual band amplifier for E-GSM(880 to 915MHz) and DCS1800(1710 to 1785MHz).

  • Page 19: 13 Mhz Clock

    3. TECHNICAL BRIEF 3.4 13 MHz Clock The 13 MHz clock (VC-TCXO-208C) consists of a TCXO (Temperature Compensated Crystal Oscillator) which oscillates at a frequency of 13 MHz. It is used within the CX74017 RF Main Chip, BB Analog chip-set (AD6521), and Digital (AD6522). FREF 2V7_VTCXO 2.2u...
  • Page 20 3. TECHNICAL BRIEF 3.6 Testing Set-up and Checking Signals A. Received RF Level and Checks This section shows the typical RF levels expected throughout the receiver path. A block diagram showing the locations of the RF measurement points and levels is shown in Fig. 3-11. Receiver Testing Set-up To check the receiver the following conditions have to be set: On a signal generator or a GSM/DCS test box, output a CW signal of amplitude = -60 dBm at either:...
  • Page 21 3. TECHNICAL BRIEF Testing Transmitter Using a suitable high frequency probe measure the RF levels at the relevant points shown in Fig. 3- 9, 10. and compare your measurements with those shown in the diagram. If there are any major difference between the readings taken and those indicated then further investigation of that particular point will be required.
  • Page 22 3. TECHNICAL BRIEF RF components (Component Side) CN303 FL405 FL406 U416 U441 U414 X401 U413 Figure 3-6. RF components (Component Side). Reference Description Reference Description U441 RF Main Chipset FL406 Dual SAW Filter CN303 Mobile S/W X401 VCTCXO FL405 Ant. S/W U414 U416 U413...
  • Page 23 3. TECHNICAL BRIEF Test point of Rx Levels Figure 3-7. Test point of Rx Levels. - 22 -...
  • Page 24 3. TECHNICAL BRIEF Test point of TX Levels Figure 3-8. Test point of TX Levels(1). - 23 -...
  • Page 25 3. TECHNICAL BRIEF Control signal test points (1) U448 U444 TXRAMP(R401) TXPA(R404) 2.85V TXQN TXIN TXQN TXIN 13MHz 2V7_VCTCXO TXQP TXIP TXQP TXIP CLock Figure 3-9. Control signal test points (1). - 24 -...
  • Page 26 3. TECHNICAL BRIEF Control signal test points (2) TP404(RXEN) TP409(LE) TP408(Clock) TP407(Data) Figure 3-10. Control signal test points (2). - 25 -...
  • Page 27 3. TECHNICAL BRIEF Figure 3-11. Transmitter & Receiver RF Levels - 26 -...
  • Page 28 3. TECHNICAL BRIEF Figure 3-12. Regulator Output (RF2V8). Figure 3-13. VCTCXO Power Supply (2V7_VTCXO). - 27 -...
  • Page 29 3. TECHNICAL BRIEF Figure 3-14. 13MHz Clock. Figure 3-15. Control Signal of FEM in Rx mode (GSM,DCS both). - 28 -...
  • Page 30 3. TECHNICAL BRIEF Figure 3-16. Control Signal of FEM in GSM TX mode. Figure 3-17. Control Signal of FEM in DCS TX mode. - 29 -...
  • Page 31 3. TECHNICAL BRIEF Figure 3-18. LE, Clcok, Data. Figure 3-19. TXEN, TARAMP, TXPA. - 30 -...
  • Page 32 3. TECHNICAL BRIEF Figure 3-20. TX IQ Signal. 7Figure 3-21. RX IQ Signal. - 31 -...

  • Page 33: Digital Main Processor

    3. TECHNICAL BRIEF 3.7 Digital Main Processor The AD6522 is an ADI designed processor. AD6522 Serial Link AD6521 Subsystem (VBC) DSP BUS EBUS PBUS DMA and BUS ARBITRATION PBUS SBUS Peripheral Subsystem SRAM FLASH Subsystem (ARM7TDMI ) RF-Control Figure 3-31. Top level block diagram of the AD6522 internal architecture. BUS Arbitration Subsystem It is to work as a cross point for data accesses between the three main busses.
  • Page 34 3. TECHNICAL BRIEF MCU subsystem It consists of an ARM7TDMI central processing unit, a boot ROM, a clock generation and access control module. The maximum clock frequency for the ARM7TDMI is 39 MHz at 2.45 V. The main clock is 13MHz and it is provided by VCTCXO.
  • Page 35 3. TECHNICAL BRIEF Figure 3-32. System interconnection of AD6522 external interfaces - 34 -...
  • Page 36 3. TECHNICAL BRIEF Interconnection with external devices RTC block interface Countered by external X-TAL The X-TAL oscillates 32.768KHz LCD module interface Controlled by LCD_MAIN_CS, LCD_RES, LCD_RS, _WR, _RD, DATA [00...07] ports Table 3-10. Description LCD_MAIN_CS LCD chip enable. Each LCD has CS pin LCD_RES This pin resets LCD module.
  • Page 37 The AD6522 check status periodically in call mode if SIM card is inserted or not , but the AD6522 don't check in deep sleep mode. Interface by SIMDATAOP, SIMCLK, SIM_RST(GPIO_23) Table 3-12. Description This pin receives and sends data to SIM card. LG-W3000 support SIMDATAOP only 3.0 volt interface SIM card. SIMCLK Clock 3.5MHz frequency.

  • Page 38: Analog Main Processor

    3. TECHNICAL BRIEF 3.8 Analog Main Processor AD6521 AD6521 MCLK Dual-Mode Voiceband B aseband Code c JTAG Interface MCLKEN RESET for ICO ITXP I TRANSMIT INTERP FILTER ITXN BSDI QTXP Q TRANSMIT FILTER QTXN BSIFS GMSK MOD BSAEBAND 32 x 10 bit TXON 10 bit SERIAL...
  • Page 39 AFC DAC: 13 bits IDAC: 10 bits Voiceband section Receive audio signal from MIC. W3000 use differential configuration. Send audio signal to Receiver. W3000 use differential configuration. It interconnect with external device like main microphone, main receiver, ear-phone and Hands free kit through the VINNORP, VINNORN, VOUTNORP, VOUTNORN, VINAUXP, VINAUXN, VOUTAUXP, VOUTAUXN VINNORP, VINNORN: Main MIC positive/negative terminal.
  • Page 40 3. TECHNICAL BRIEF Figure 3-35. AD6521 Circuit diagram - 39 -...

  • Page 41: Power Management

    3. TECHNICAL BRIEF 3.9 Power Management ADP3408 Figure 3-36. ADP3408 inner block diagram. Power up sequence logic The ADP3408 controls power on sequence Power on sequence If a battery is inserted, the battery powers the 6 LDOs. Then if PWRONKEY is detected, the LDOs output turn on.
  • Page 42 VMEM 2.80 V (is provided to Flash) Battery charging block It can be used to charge Lithium Ion and/or Nickel Metal Hydride batteries. W3000 use Li-Ion battery only. Charger initialization, trickle charging, and Li-Ion charging control are implemented in hardware.

  • Page 43: Memories

    Back light LED Backlight W3000 has single type LCD. There are the control output LCD_CS which is derived from AD6522, this acts as the chip select enable for the LCD . AD6522 uses DATA[00:07] pins to send data for displaying graphical text onto the LCD...

  • Page 44: Keypad Switches And Scanning

    3. TECHNICAL BRIEF 3.12 Keypad Switches and Scanning The key switches are metal domes, which make contact between two concentric pads on the keypad layer of the PCB when pressed. There are 19switches (S301-S325,not used S303~S309), connected in a matrix of 5 rows by 5 columns, as shown in Figure, except for the power switch (S310), which is connected independently.

  • Page 45: Microphone

    3. TECHNICAL BRIEF 3.13 Microphone The microphone is placed to the front cover and contacted to main PCB. The audio signal is passed to VINNORP (#J10) and VINNORN (#K10) pins of AD6522. The voltage supply 2V45_VAN is output from ADP3408, and is a bias voltage for both the VINNORP (through R101) and VINAUX (through R112) lines.

  • Page 46: Earpiece

    3. TECHNICAL BRIEF 3.14 Earpiece The earpiece is driven directly from AD6521 VOUTNORP (#K8) and VOUTNORN (#K7) pins and the gain is controlled by the PGA in an AD6521. The earpiece is placed in the front cover and contacted to main PCB. Figure 3-38.

  • Page 47: Key Back-Light Illumination

    3. TECHNICAL BRIEF 3.17 Key Back-light Illumination In key back-light illumination, there are 12 Blue LEDs in Main Board, which are driven by KEY_BACKLIGHT line from AD6522. Figure 3-40. Key Back-light Illumination. 3.18 LCD Back-light Illumination In LCD Back-light illumination, there is an driver in FPCB Board, which is driven by BACKLIGHT line from AD6522.

  • Page 48: Speaker & Midi Ic

    3. TECHNICAL BRIEF 3.19 Speaker & MIDI IC LG-W3000 don’t use buzzer. Instead use loud speaker and Melody IC which support handsfree function and various melody sound. • Melody IC control 5 GPIO is assigned to control melody IC. Melody data is transferred to melody IC and played by loud phone.
  • Page 49 3. TECHNICAL BRIEF MA-3 is a synthesizer LSI for mobile phones that realize advanced game sounds. This LSI has a built-in speaker amplifier, and thus, is an ideal device for outputting sounds that are used by mobile phones in addition to game sounds and ringing melodies that are replayed by a synthesizer. The synthesizer section adopts “stereophonic hybrid synthesizer system”...

  • Page 50: Trouble Shooting

    4. TROUBLE SHOOTING 4. TROUBLE SHOOTING 4.1 POWER ON TROUBLE START PIF Power On, Test after Call 112 Battery Change the Battery voltage >3.2? U101 Pin2 From Low to High Change U101 Level change? U101 Check! Pin 10=2.9V Pin 21=2.8V Change U101 Pin 25=2.7V Pin 6=2.45V...
  • Page 51 4. TROUBLE SHOOTING Test) U101 (PMIC) Check A) Check the voltage level of battery. If voltage level < 3.2V, Charge the battery. If voltage level > 3.2V, go on to B B)Check pin 2 of PMIC(U101);POWER ON KEY - 50 -...
  • Page 52 4. TROUBLE SHOOTING 4.2 Charge Trouble START PIF Power On, Test after Call 112 Connection Check Solderring CN302 Check! TA Voltage = Check TA 5.2V Check change after change U102 Check change after change D101 Change working! - 51 -...
  • Page 53 4. TROUBLE SHOOTING Test) U102 & D101 Check!! A) Check “Is the battery pack well connected to the phone?” If not, reassemble battery pack. B) Check the battery voltage level. (3.2~4.2V) “Yes” Check multi-color LED in the folder. “No” Check TA. C)Check U102, D101.

  • Page 54: Lcd Trouble

    4. TROUBLE SHOOTING 4.3 LCD Trouble SETTING : After Initialize Agilent 8960, Test in EGSM, DCS Mode START PIF Power On,Test after Call 11 2 Is the connection of LCD Reassemble LCD With LCD connector on connector Nain board is OK? J101 Check Resolder connector...
  • Page 55 4. TROUBLE SHOOTING Test) CN301 Check!! A) Check the connection between LCD & Main board B) Check the soldering of LCD& Main board C) Replace LCD module - 54 -...

  • Page 56: Receiver Trouble

    4. TROUBLE SHOOTING 4.4 Receiver Trouble SETTING : After Initialize Agilent 8960, Test in EGSM, DCS Mode START PIF Power On, Testafter Call 112 Check the signal level of Replace the Main board. “VOUTNORP” at Pin 3 of FL301. Is ABB is out of order.
  • Page 57 4. TROUBLE SHOOTING Test) The Receiver part Circuit Digram VOUTNORP VOUTNORN FL301 V307 - 56 -...

  • Page 58: Speaker Trouble

    4. TROUBLE SHOOTING 4.5 Speaker Trouble SETTING : After Initialize Agilent 8960, Test in EGSM, DCS Mode START PIF Power On, Test after Call112 J302 Check!! Confirm Speaker Check Conne ctor connector Speaker Check!! Check Replace Speaker PIN1, 2 of J302 SIM Detect Working!! - 57 -...
  • Page 59 4. TROUBLE SHOOTING Test) Speaker Check!! J302 J302 A) Check J302, the Speaker connect in the Main board. B) Check pin 1, 2 of J302 with oscilloscope. C) Change the speaker - 58 -...

  • Page 60: Mic Trouble

    4. TROUBLE SHOOTING 6) Mic. Trouble SETTING : After Initialize Agilent 8960, Test in EGSM, DCS Mode START PIF Power On, Test after Call 112 MIC Bias voltage Voltage at Replace Check if the C114 voltage is pin 24 of U101 is the U101.
  • Page 61 4. TROUBLE SHOOTING Test) MIC101 Check!! R101 C114 R104 R105, R107, MIC101 C120, C124 L101, L102 The signal flow of the microphone MIC activating to U103. The voltage at this signal : Mic is point goes to activated when almost 0V when the this signal goes mic is activated.
  • Page 62 4. TROUBLE SHOOTING C114 R104 R101 R101 L101 C124 R107, R105 C120 L102 Q101 - 61 -...

  • Page 63: Vibrator Trouble

    4. TROUBLE SHOOTING 7) Vibrator Trouble SETTING : After Initialize Agilent 8960, Test in EGSM, DCS Mode START PIF Power On, Test after Call 112 CN201 Check! Check Confirm Vibrator Pad Vibrator Pad Check Pin1,2 Change Vibrator Of Vibrator Pad Vibrator Working!! - 62 -...
  • Page 64 4. TROUBLE SHOOTING Test) Vibrator Check!! Q201 Q203 D302 A) Check the vibrator pad in the Main board. B) Check pin 1,2 of CN201. C) Change the vibrator. - 63 -...

  • Page 65: Backlight Trouble

    4. TROUBLE SHOOTING 8) Backlight LED Trouble SETTING : After Initialize Agilent 8960, Test in EGSM, DCS Mode START PIF Power On, Test after Call 112 Detect Signal Level? Check Diode In D309 ~ D313 J101 Check!! Check Q201 current Replace Transistor Q201 450 ~ 500mA Backlight LED...
  • Page 66 4. TROUBLE SHOOTING Test) D302~D313/Diode & Q201 Check!! Q201 A) Check the diode LD309~LD313. B) Check the current through Q201. - 65 -...

  • Page 67: Sim Detect Trouble

    4. TROUBLE SHOOTING 9) SIM Detect Trouble SETTING : After Initialize Agilent 8960, Test in EGSM, DCS Mode START PIF Power On, Test after Call 112 Check SIM card Change SIM card For 3V ? J101 Check!! Check SIM Replace SIM Connector soldering? connector J101 SIM Detect Working!!
  • Page 68 4. TROUBLE SHOOTING Test) SIM Connector Check!! 2V45_VAN A) Check the contact between SIM socket and PCB. - 67 -...

  • Page 69: Earphone Trouble

    4. TROUBLE SHOOTING 10) Earphone Trouble SETTING : After Initialize Agilent 8960, Test in EGSM, DCS Mode START PIF Power On, Test after Call 112 Inset the earphone to the phone Earphone detect problem Does the audio profile of the phone change to the earphone mode? Audio path problem Set the audio part of the...
  • Page 70 4. TROUBLE SHOOTING Earphone receiving path problem Is the signal level at pin Is the signal level at pin Is the signal level at 6 of U305 a few tens or 5 of U305 a few tens or R334 a few tens or hundreds hundreds VAC? hundreds VAC? VAC?
  • Page 71 4. TROUBLE SHOOTING Q201 U305 U308 - 70 -...
  • Page 72 4. TROUBLE SHOOTING C145 C170 J301 R334 R307 - 71 -...
  • Page 73 4. TROUBLE SHOOTING - 72 -...

  • Page 74: Hfk Trouble

    4. TROUBLE SHOOTING 12) HFK Trouble SETTING : After Initialize Agilent 8960, Test in EGSM, DCS Mode START PIF Power On, Test after Call 112 Check Replace CN302 CN302 ? Soldering Check!! Replace Resistor & Capicitor Check Soldering R311, C311 R311,C311 ? Working!! - 73 -...
  • Page 75 4. TROUBLE SHOOTING Test) CN302 & R311 Check!! R311 R311 A) Check the contact between CN302 and HFK jack. B) Check the R311 - 74 -...

  • Page 76: Assembly Instruction

    4. TROUBLE SHOOTING 5. TROUBLE SHOOTING 6. TEST POINT DATA 7. ASSEMBLY INSTRUCTION - 75 -...
  • Page 77 4. TROUBLE SHOOTING 8. BLOCK DIAGRAM 9. COMPONENT LIST - 76 -...

  • Page 78: Download

    4. TROUBLE SHOOTING 10. DOWNLOAD AND CALIBRATION 10.1 Download Fig. 9-1 and 9-2 illustrate a download set-up. LG-W3000 Data Cable Figure 9-1. Download Setup 1. Download procedure Access flash loader program in PC. Select source code you want to download.
  • Page 79 Connect Datakit to the phone. 3. Download method when battery under 3.2 voltage First : Remove battery in the phone Second : Connect TA to the Datakit Third : Connect phone to the Datakit. LG-W3000 Figure 9-2. Download Setup 2. - 78 -...
  • Page 80 G SM Test S e t ( 8960) GP IB C abl e M obil e Swit c h C able Pow er Su pply GP IB Cabl e LG - W3000 B atte r y Si m ul ato r Ji g - 79 -...
  • Page 81 4. TROUBLE SHOOTING JTAG2 JTAG1 AUDIO Status REMOTE POWER UART POWER Status DC IN Figure 9-4. The top view of Test Jig. C. Test Jig Operation Table 9-2. Jig Power. Power Supply usually 4.0V DC Adaptor 9.5V, 500mA Table 9-3. Jig DIP Switch. Switch Number Name Description...
  • Page 82 4. TROUBLE SHOOTING Table 9-4. LED Description. Switch Number Name Description Switch 1 RPWRON In ON state, phone is awaked. Switch 2 HF_DETECT Turn on for AUDIO TEST Switch 3 Power Supply Power is provided for phone from Power Supply Switch 4 D.C power Power is provided for phone from DC adaptor.

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